Elevator



110- Model.) 2 Sheets-Sheet 1. G. L. GILBERT. ELEVATOR.

No. 456,194. Patented July 21, 1891.

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(No Model.) 2 Sheets-Sheet 2.

G. L. GILBERT.

ELEVATOR No. 456,194. Patented July 21,1891.

PATENT GIDEON L. GILBERT, on DAYTON, OHIO.

ELEVATOR.

SPECIFICATION'forming part of Letters Patent N 0. 456,194, dated July21, 1891.

Application filed March 27. 1891. Serial No. 386.629. (No model.)

To aZZ whom it may concern.-

Be it known that I, GIDEoN L. GILBERT, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Elevators; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,makingapart of this specification, and to the letters of referencemarked thereon.-

This invention relates to certain new and useful improvements inelevators; and it has for its immediate object to provide a simple,cheap, and efficient automatic mechanism for operating the gate or gatesfor the purpose of preventinginjury and loss of life by accidents causedby carelessness in leaving the gates open. uating the gates by themovement of the car that the said gates will be opened as the plat formapproaches a landing, opening the gates wide when the platform is'at thelanding and closing them as the car moves away from the said landing. Imay operate two gates, one

upon each side of the platform, or only one,

as the circumstances may require. I provide the platform or carriagewith a double cam, which serves to operate the gates both in the upwardand downward movements of the car, and arrange this cam so that it maybe thrown out of operation when it is desired to run the car withoutoperating the gates. A bell-crank lever is provided with one arm inthepath of the said cam, the other end being so connected with mechanismas to throw the gate from a horizontal to a vertical position. The gatecannot remain open, except when the platform is at the landing. At allother times it must remain closed. the part of the operator isnecessary.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon,form a part of thisspecification, and in which- Figure 1,is a view at right angles to thegates, showing two floors of a building equipped with my improvements,the parts be- I provide novel mechanism for so act-,

Thus no attention on ing shown in side elevation with the car betweenthe floors. Fig. 2 is a perspective detail showing the mechanism whichactuates the gate th rough the medium of the cam. Fig. 3 is a verticalsection showing the car at a landing and the gates thrown up. Fig. i isa detail in top plan showing the cam engaging with the arm of thebell-crank lever.

throughout the several views. 4

Referrin g nowto thedetails of the drawings by letter, A designates afloor of a building, and A another. Of course, although I have chosen toillustrate the invention in connection with but two floors, it will beunderstood that the same construction may be employed in a buildingfourteen stories high, if desired; but two are considered sufficient forthe purpose of illustrating the invention.

B designates the uprights at opposite sides of the shaft and which serveas guides for the car. At the upper ends they are connected by thecross-piece B supporting the pulley B over which the hoisting-cordpasses. This hoisting-cord O is connected at one end with the car, asseen best in Fig. 3, audits other end secu red to and designed to beWound upon the drum 0, which is suitably journaled in supports, as 0,(shown in Fig.1,) and provided 'with suitable crank-handle c, as shown,by the turning of which the elevator may be raised and lowered asdesired.

The novel features of the present invention may be employed withelevators raised and lowered by other means equally as well, andtherefore I do not wish to restrict myself to its employmentinconnection with the form of ho sting means shown.

The car D may be of any of the known or preferred forms, being suitablybraced, as shown. At one cornerit has secured thereto adjustably acasting D, which has a horizontal portion (Z, which is provided withelongated slots 6, through which pass the screws f, as seen best in Fig.at, allowing of longitudinal movement of the casting when desired, aswill be readily understood from Fig. 4. Alever E is provided, pivoted atg to the upright of the car and connected with the said casting in anysuitable manner, as by the rod or link It, as seen in Fig. 3, the saidlever being under the control of the operator in the car, and by Likeletters of reference indicate like parts which the plate may be moved tothrow the cam portion of the casting into or out of operative position.This casting is formed with a vertical portion '11, substantially flushwith the outer edge of the car and formed with a double cam-groove j,extended beyond the edge of the elevator, as seen in Fig. 4. At eachlanding I pivot on a vertical pivot a bellcrank lever F, as seen best inFigs. 2 and a, the inner arm of the lever projecting in the path of thedouble cam, as seen in Fig. and preferably provided with a roller 7; tolessen the frictional contact. To the other arm of the bell-crank leveris pivotally and adj ustably connected the arm G, the outer portion ofwhich is bifurcated, as seen in Fig. 2, and between the bifurcations ofwhich is adjustably pivoted the crank-arm H, which is fast upon thehorizontal shaft 1, as seen best in Fig. 2, the said shaft beingjournaled in suitable bearings Z and carrying at one or both ends asegmental gear J, as shown in Fig. 2. This gear meshes with a gear-wheelK, carried by a plate m, fast on the inner face of the gate L, which ispivoted at its lower edge 011 the shaft or pivot n, as seen in Fig. 2.

The gate may be of any known or preferred form of construction, and isprovided near its upper edge at the pivot end with a weighted arm M,which serves as a counter-balance to aid in moving it from a horizontalto a vertical position, and also as a rest and stop therefor to limitits movement, as seen in Fig.

The operation will be readily understood. \Vhen the casting D is thrownout by its 1e verso as to be out of the path of the bellcrank lever, thecar moves up and down without operating the gates but when the castingis thrown in so as to bein the path of the said lever as the carapproaches a landing the cam engages the inner arm of the bell-cranklever and causes it to move on its pivot, rocking the shaft I, andthrough the medium of the segmental gear engaging the gear on the gate,causing the gate to turn on its pivot into a vertical position, as seenin Fig. 3. As the car proceeds on its course the roller of thebell-crank lever riding in the cam groove moves in the other directionand the gates are thrown down. The parts are so proportioned that thegates are full open when the car is exactly at the landing, and themoment the car leaves the landing either going up or down the gatesbegin to move back to their closed position. All this is automatic,requiring no attention on the part of the operator.

The mechanism is simple, very efficient for the purpose for which it isdesigned, and can be readily applied to elevators now in use.

Various modifications in detail may be re sorted to without departingfrom the spirit of the invention or sacrificing any of its advantages.

\Vhat I claim as new isl. The combination, with the car and the pivotedgate, of the casting on the car, having a double cam-groove, the gearmoving with the pivot of the gate, the rock-shaf t parallel with thegate-pivot, the segmental gear on one end of the rock-shaft, thecrank-arm on the shaft, the arm G, pivotally connected with the crankarm, and the bell-crank lever pivotally con nected at one end with thearm G and at the other end carrying a roller working in the camgroove ofthe casting, substantially as specitied.

2. The combination,with the car and the gate, of the pivot of the gate,carrying a plate m, secured to the inner face of the gate, and formedwith gear K, moving with the pivot, the rock-shaft, the segmental gearthereon, the cam on the car, and intermediate connections, substantiallyas specified, between the rock-shaft and the cam, as set forth.

In testimony that I claim the above I have hereunto subscribed my nameinthepresence of two witnesses.

' GIDEON L. GILl-KER'I.

\Vitn esses:

.T. (l. Pn'r'rnnson, l MURPHY.

